That is, there are four of them
The Apple M4 single-chip system is currently only available in the iPad Pro, where its full potential is clearly not revealed. For example, it was discovered that this SoC has twice as many Thunderbolt controllers as the M3.
Photos of the crystals of the two platforms under a microscope show that the M3 has two Thunderbolt controllers, while the M4 already has four.
Increasing the number of Thunderbolt controllers could result in increased data throughput per port, meaning that in addition to increased data transfer speeds, owners of future MacBook Pros will likely be able to use these ports to connect high-speed monitors. resolution and run them at a higher refresh rate. As a reminder, new M4-based MacBook Pros are expected by the end of the year.